%XOOHWLQꢀꢁꢂꢂꢃ+$
*HQHUDOꢀ3XUSRVHꢀ5HOD\Vꢀ
6SHFLILFDWLRQV:ꢀ&RQWLQXHGꢀꢀ
ꢁꢂꢂꢃ+$ꢀ5HOD\ꢀ3HUIRUPDQFHꢀ*UDSKV
107
20
10
A
B
C
1
6
4
0.8
k
2
0.6
0.4
106
1
0.6
0.4
0.2
1
0.8
0.6
0.4
0.2
0.1
105
20
60
100
140
180
220
0
0.5
1
1.5
2
2.5
3
FRV
9ROVWODJLTAHGꢈ'E &DCꢈꢍ(9V)4
%UHDNLQJꢈFDSDFLW\ꢈIRUꢈ'&ꢃꢈORDGꢈDWꢈꢃꢊꢁꢁꢈF\FOHVꢌK
ϕ
COS ∃
/RDGꢈꢍN9$4
LOAD (kVA)
$ ꢀORDGꢈDSSOLHGꢈWRꢈꢃꢈFRQWDFWꢈ
Breaking capacity for DC1 load at 1,800 cycles/ h.
&RQWDFWꢈOLIHꢈYVꢉꢈ$&ꢃꢈORDGꢈDWꢈꢃ*ꢊꢁꢁꢈF\FOHVꢌK
Contact life vs AC1 load at 1,800 cycles/ h.
ꢈꢈꢈꢈꢈꢈꢈꢈꢈꢈꢈꢈꢈꢈꢈꢈ/RDGꢈUHGXFWLRQꢈIDFWRUꢈYVꢉꢈFRVꢈ
ϕ
A = load applied to 1 contact
% ꢈORDGꢈDSSOLHGꢈWRꢈꢄꢈFRQWDFWVꢈLQꢈVHULHV
B = load applied to 2 contacts in series
& ꢀORDGꢈDSSOLHGꢈWRꢈWKUHHꢈFRQWDFWVꢈLQꢈVHULHV
Load reduction factor vs cos ∃.
7LPHꢀ0RGXOHꢀ&DWꢍꢀ1Rꢍꢀꢁꢂꢂꢃ+7ꢆ
(OHFWULFDOꢀ5DWLQJV
7LPHꢀ0RGXOHꢀ&DWꢍꢀ1Rꢍꢀꢁꢂꢂꢃ+7ꢅ
ꢉꢃ«ꢉꢃꢀ9ꢁ$&ꢁDWꢁꢇꢀꢌꢅꢀꢁ+]
ꢉꢃ«ꢉꢇꢀ9ꢁ'&
2SHUDWLQJꢁ9ROWDJHꢁ5DQJH
3RZHUꢁ&RQVXPSWLRQ
ꢈꢉ«ꢄꢀ9ꢁ'&
ꢉꢃ9ꢁ$&ꢌ'&ꢁ
ꢉꢃꢀ9ꢁ$&ꢌ'&
ꢊꢀꢁP:
ꢈꢉ9ꢁ'&ꢁ
ꢄꢀ9ꢁ'&ꢁ
ꢃꢀꢁP:
ꢊꢀꢀꢁP:
ꢈꢀꢀꢁP:
0D[LPXPꢁ2XWSXWꢁ&XUUHQW
0D[LPXPꢁ2XWSXWꢁ9ROWDJH
0D[LPXPꢁ2XWSXWꢁ3RZHU
ꢎꢀꢁP$ꢁ@ꢉꢁ:ꢁDWꢁꢉꢃ9ꢁ'&A
ꢉꢅꢇ9ꢁ$&ꢍꢁꢉꢊꢇ9ꢁ'&
ꢊꢂꢇꢁ9$ꢁ@ꢄꢀꢁP$ꢁDWꢁꢉꢃꢀ9ꢁ$&A
0HFKDQLFDO
ꢈꢉꢀꢁP$ꢁ@ꢉꢁ:ꢁDWꢁꢉꢃ9ꢁ'&A
ꢄꢄ9ꢁ'&
ꢃꢁ:
'HJUHHꢁRIꢁ3URWHFWLRQꢁRIꢁ,QSXWꢁ@%ꢈAꢁ
7HUPLQDO
,3ꢁꢉꢀꢁ@*XDUGHGꢁ7HUPLQDOA
ꢉꢁ[ꢁꢈꢂꢇꢁPPꢉꢁ@ꢉꢁꢔꢁꢈꢅꢁ$:*«ꢈꢁꢔꢁꢉꢀꢁ$:*A
ꢀꢂꢃꢇ«ꢀꢂꢎꢁ1Pꢁ@ꢃ«ꢊꢁOEꢋLQꢂA
,QSXWꢁ7HUPLQDOꢁ:LUHꢁ5DQJH
,QSXWꢁ7HUPLQDOꢁ7RUTXHꢁ5DQJH
/('ꢁ,QGLFDWRU
6WHDG\ꢁZKHQꢁ3RZHUꢁ2QꢁDQGꢁ)ODVKLQJꢁGXULQJꢁ7LPLQJꢁ3HULRG
ꢒꢀꢂꢇꢑꢁRUꢁꢇꢁPV
5HSHDWꢁ$FFXUDF\ꢁ
9ROWDJHꢁ(IIHFW
7LPLQJꢁ&KDQJH
≤ꢀꢂꢀꢀꢈꢑꢌ9
≤ꢀꢂꢀꢈꢑꢌ°&
3RZHUꢁ5HVHWꢏꢁꢈꢇꢀꢁPV
≤ꢀꢂꢀꢀꢈꢑꢌ9
≤ꢀꢂꢀꢈꢑꢌ°&
3RZHUꢁ5HVHWꢏꢁꢈꢇꢀꢁPV
7HPSꢂꢁ(IIHFW
5HVHWꢁ7LPH
6LJQDOꢁ5HVHWꢏꢁꢇꢀꢁPVꢁ$&ꢍꢁꢄꢀꢁPVꢁ'&
6LJQDOꢁ5HVHWꢏꢁꢈꢀꢁPVꢁ'&
ꢄꢁ',3ꢁ6ZLWFKHVꢍꢁꢎꢁ5DQJHVꢁ@VHWꢁIURPꢁꢈꢀ«ꢈꢀꢀꢑꢁRIꢁUDQJHAꢏ
6HOHFWDEOHꢁ7LPLQJꢁ5DQJHV
ꢈ VꢍꢁꢈꢀꢁVꢍꢁꢈꢁPLQꢂꢍꢁꢈꢀꢁPLQꢂꢍꢁꢈꢁKUꢂꢍꢁꢈꢀꢁKUꢂꢍꢁꢉꢃꢁKUꢂꢍꢁꢉꢃꢀꢁKUꢂ
ꢄꢁ',3ꢁ6ZLWFKHVꢍꢁꢎꢁ0RGHVꢏ
3RZHUꢁ21±'HOD\
6LQJOHꢁ6KRWꢁ±ꢁ3RZHUꢁ2Q
5HSHDWꢁ&\FOHꢁ±ꢁ6WDUWLQJꢁZLWKꢁ2))ꢋ'HOD\
5HSHDWꢁ&\FOHꢁ±ꢁ6WDUWLQJꢁZLWKꢁ21ꢋ'HOD\
6LJQDOꢁ2))±'HOD\
6HOHFWDEOHꢁ7LPLQJꢁ0RGHV
6LQJOHꢁ6KRWꢁ±ꢁ6LJQDOꢁLVꢁDꢁ3XOVH
6LQJOHꢁ6KRWꢁ±ꢁ6LJQDOꢁ2II
6LJQDOꢁ21±'HOD\
7KXPEZKHHOꢁ6FDOHꢁ$FFXUDF\
≤ꢇꢑꢁRIꢁ7LPHꢁ5DQJH
(QYLURQPHQWDO
7HPSHUDWXUH
$OWLWXGH
2SHUDWLQJ
6WRUDJH
±ꢉꢇ«ꢓꢇꢇ°&ꢁ@±ꢈꢄ«ꢓꢈꢄꢈ°)A
±ꢇꢇ«ꢓꢎꢇ°&ꢁ@±ꢅꢊ«ꢓꢈꢎꢇ°)A
ꢉꢀꢀꢀꢁPꢁ@ꢅꢇꢅꢀꢁIWA
&RQVWUXFWLRQ
(QFORVXUH
*UD\ꢁ3ODVWLFꢁ+RXVLQJ
0RXQWLQJꢁZLWKꢁ6RFNHWꢁ2QO\
ꢎꢋꢁRUꢁꢈꢈꢋ3LQꢁ6RFNHWꢁZLWKꢁ0RGXOHꢁ3OXJ
ꢊꢀꢀꢋ+1ꢉꢀꢉꢁ@ꢎꢋ3LQꢁZLWKꢁ3OXJA
ꢊꢀꢀꢋ+1ꢉꢀꢄꢁ@ꢈꢈꢋ3LQꢁZLWKꢁ3OXJA
6RFNHWV
&HUWLILFDWLRQV
&(ꢍꢁ8/ꢁOLVWHGꢍꢁ&6$
ꢀ 3HUIRUPDQFHꢁ'DWDꢁꢋꢁ6HHꢁSDJHꢁ,PSRUWDQWꢋꢉꢍꢁSXEOLFDWLRQꢁ$ꢈꢈꢄꢂ
$WꢁFRQVWDQWꢁYROWDJHꢁDQGꢁWHPSHUDWXUHꢂ
ꢎꢂ